#include <iostream>
using namespace std;

int main()
{
    int n, x, m;
    cin >> n >> x >> m;
    int a[200005];
    for(int i = 0; i < n; i++)
    {
        cin >> a[i];
    }
    for(int i = n; i > 0; i--)
    {
        while(a[i - 1] >= x)
        {
            for(int j = 0; j < i; j++)
            {
                a[j] /= 2;
            }
            m -= i;
        }
    }
    cout << (m >= 0 ? "Yes" : "No") << endl;
}